:root {
  color-scheme: dark;
  --bg: #020617;
  --panel: #0f172a;
  --panel-soft: #111c33;
  --text: #f8fafc;
  --muted: #94a3b8;
  --line: rgba(148, 163, 184, 0.22);
  --line-strong: rgba(248, 250, 252, 0.44);
  --accent: #e11d48;
  --accent-2: #f97316;
  --radius: 24px;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  --toolbar-height: 74px;
  --bottom-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(225, 29, 72, 0.2), transparent 34rem),
    radial-gradient(circle at 85% 12%, rgba(249, 115, 22, 0.15), transparent 28rem),
    var(--bg);
  color: var(--text);
}

button,
select,
input {
  font: inherit;
}

button,
a,
select {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(251, 113, 133, 0.65);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.12rem 0.36rem;
  background: rgba(15, 23, 42, 0.75);
  color: #fde68a;
}

.site-header,
.reader-toolbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--toolbar-height);
  padding: 0.85rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  font-weight: 900;
  letter-spacing: -0.08em;
}

.brand small,
.reader-title small,
.site-footer span:last-child {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.top-nav a,
.reader-actions button,
.reader-controls button,
.reader-back,
.button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.7rem 1rem;
  background: rgba(15, 23, 42, 0.62);
  color: var(--text);
  font-weight: 800;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.top-nav a:hover,
.reader-actions button:hover,
.reader-controls button:hover,
.reader-back:hover,
.button:hover {
  transform: translateY(-1px);
  border-color: rgba(248, 250, 252, 0.55);
}

main {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  min-height: 74vh;
  padding: 4rem 0;
}

.compact-hero {
  min-height: 58vh;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: #fb7185;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.06em;
  line-height: 0.94;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 6.1rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.hero-copy p:not(.eyebrow),
.section-head p,
.steps {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  cursor: pointer;
}

.button.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.button.ghost {
  background: rgba(15, 23, 42, 0.75);
}

.button.is-disabled,
.button[aria-disabled="true"] {
  opacity: 0.42;
  pointer-events: none;
}

.hero-card,
.reader-picker-card,
.empty-state,
.deploy-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(15, 23, 42, 0.72);
  box-shadow: var(--shadow);
}

.hero-card {
  overflow: hidden;
}

.mock-browser {
  display: flex;
  gap: 0.45rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.mock-browser span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--muted);
  opacity: 0.8;
}

.mock-reader-screen {
  display: grid;
  grid-template-columns: 52px 1fr 52px;
  gap: 1rem;
  align-items: center;
  min-height: 470px;
  padding: 1rem;
}

.mock-reader-screen button {
  width: 52px;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(248, 250, 252, 0.08);
  color: var(--text);
  font-size: 2rem;
}

.mock-page.single {
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(248, 250, 252, 0.12), transparent 55%),
    repeating-linear-gradient(135deg, rgba(248, 250, 252, 0.08) 0 8px, transparent 8px 16px),
    #111827;
}

.section {
  padding: 3.6rem 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 2rem;
}

.inline-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  max-width: none;
}

.reader-picker-card {
  display: grid;
  grid-template-columns: 0.85fr 0.95fr 1.3fr auto;
  gap: 0.85rem;
  align-items: end;
  padding: 1rem;
}

.reader-picker-card label,
.reader-picker-strip label,
.search-box {
  display: grid;
  gap: 0.38rem;
}

.reader-picker-card span,
.reader-picker-strip span,
.search-box span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

select,
input[type="search"] {
  min-height: 46px;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.68rem 0.8rem;
  background: rgba(2, 6, 23, 0.86);
  color: var(--text);
}

.library-tools {
  display: grid;
  grid-template-columns: minmax(220px, 420px) auto;
  gap: 1rem;
  align-items: end;
  margin-top: 1rem;
}

.library-stats {
  color: var(--muted);
  font-weight: 800;
  text-align: right;
}

.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
}

.chapter-card-link {
  display: grid;
  grid-template-columns: 66px 1fr auto;
  gap: 0.85rem;
  align-items: center;
  min-height: 86px;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.66);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.chapter-card-link:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: rgba(17, 28, 51, 0.9);
}

.chapter-number {
  display: grid;
  min-width: 56px;
  min-height: 56px;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(225, 29, 72, 0.45), rgba(249, 115, 22, 0.24));
  font-size: 1.05rem;
  font-weight: 950;
}

.chapter-meta {
  min-width: 0;
}

.chapter-meta strong,
.chapter-meta small {
  display: block;
}

.chapter-meta strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chapter-meta small {
  margin-top: 0.25rem;
  color: var(--muted);
}

.empty-state {
  grid-column: 1 / -1;
  padding: 1.2rem;
}

.empty-state h3 {
  margin: 0 0 0.5rem;
}

.empty-state p {
  margin: 0;
  color: var(--muted);
}

.deploy-panel {
  display: grid;
  grid-template-columns: 0.55fr 1fr;
  gap: 2rem;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.steps {
  margin: 0;
  padding-left: 1.2rem;
}

.steps li + li {
  margin-top: 0.8rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem clamp(1rem, 4vw, 4rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.reader-body {
  min-height: 100vh;
  min-height: 100svh;
  min-height: 100dvh;
  background: #020617;
  overflow: hidden;
  overscroll-behavior: none;
}

.reader-body .reader-toolbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 60;
  min-height: var(--toolbar-height);
  transition: opacity 180ms ease, transform 180ms ease;
}

.page-reader-toolbar {
  padding-left: max(0.85rem, env(safe-area-inset-left));
  padding-right: max(0.85rem, env(safe-area-inset-right));
}

.reader-title {
  min-width: 0;
  text-align: center;
}

.reader-title strong,
.reader-title small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reader-actions {
  display: flex;
  gap: 0.5rem;
}

.reader-actions button {
  cursor: pointer;
}

.reader-page-shell {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100vh;
  height: 100svh;
  height: 100dvh;
  max-width: none;
  margin: 0;
  overflow: hidden;
  background: #020617;
}

.reader-picker-strip {
  position: fixed;
  top: calc(var(--toolbar-height) + env(safe-area-inset-top));
  right: max(0.75rem, env(safe-area-inset-right));
  left: max(0.75rem, env(safe-area-inset-left));
  z-index: 55;
  display: grid;
  grid-template-columns: 0.85fr 1.4fr 0.8fr;
  gap: 0.75rem;
  padding: 0.65rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.34);
  transition: opacity 180ms ease, transform 180ms ease;
}

.single-reader-stage {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: block;
  min-height: 0;
  overflow: hidden;
  background: #020617;
}

.single-page-view {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  width: 100vw;
  width: 100dvw;
  height: 100vh;
  height: 100svh;
  height: 100dvh;
  min-height: 0;
  overflow: auto;
  padding: 0;
  overscroll-behavior: contain;
  touch-action: pan-y;
  user-select: none;
  scrollbar-width: thin;
}

.single-page-view img {
  display: block;
  flex: 0 0 auto;
  width: min(100vw, 1120px);
  max-width: 100vw;
  height: auto;
  max-height: none;
  object-fit: contain;
  border-radius: 0;
  opacity: 0;
  transition: opacity 150ms ease;
  box-shadow: 0 12px 45px rgba(0, 0, 0, 0.35);
  background: #0f172a;
}

.single-page-view img.is-loaded {
  opacity: 1;
}

.fit-page .single-page-view {
  align-items: center;
  overflow: hidden;
  padding: 0;
}

.fit-page .single-page-view img {
  width: auto;
  max-width: 100vw;
  max-height: 100svh;
}

.fit-width .single-page-view img {
  cursor: grab;
}

.reader-placeholder {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 62;
  transform: translate(-50%, -50%);
  padding: 1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.82);
  color: var(--muted);
}

.tap-zone {
  display: none;
}

.page-arrow {
  position: fixed;
  top: 50%;
  z-index: 50;
  display: grid;
  width: clamp(44px, 5.5vw, 64px);
  height: clamp(44px, 5.5vw, 64px);
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(2, 6, 23, 0.58);
  color: var(--text);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
  cursor: pointer;
  backdrop-filter: blur(14px);
  transform: translateY(-50%);
  transition: opacity 180ms ease, transform 180ms ease, background 160ms ease, border-color 160ms ease;
}

.page-arrow-left {
  left: max(0.75rem, env(safe-area-inset-left));
}

.page-arrow-right {
  right: max(0.75rem, env(safe-area-inset-right));
}

.page-arrow:hover {
  border-color: var(--line-strong);
  background: rgba(17, 28, 51, 0.94);
}

.page-arrow:disabled {
  opacity: 0.28;
  cursor: not-allowed;
}

.scroll-reader {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2;
  min-height: 0;
  overflow: auto;
  padding: calc(var(--toolbar-height) + 1rem + env(safe-area-inset-top)) 1rem calc(var(--bottom-height) + 1rem + env(safe-area-inset-bottom));
  background: #020617;
}

.scroll-reader img {
  display: block;
  width: min(100%, 1120px);
  height: auto;
  margin: 0 auto 1rem;
  border-radius: 0;
  background: #0f172a;
  box-shadow: 0 12px 45px rgba(0, 0, 0, 0.35);
}

.scroll-mode .single-reader-stage {
  display: none;
}

.scroll-mode .scroll-reader {
  display: block;
}

.reader-help {
  position: fixed;
  right: max(0.75rem, env(safe-area-inset-right));
  bottom: calc(var(--bottom-height) + 0.75rem + env(safe-area-inset-bottom));
  left: max(0.75rem, env(safe-area-inset-left));
  z-index: 65;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.6rem clamp(0.8rem, 3vw, 1.5rem);
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--muted);
  background: rgba(2, 6, 23, 0.86);
  backdrop-filter: blur(18px);
  font-size: 0.86rem;
}

.reader-help span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.38rem 0.62rem;
  background: rgba(15, 23, 42, 0.72);
}

.bottom-page-nav {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.75rem;
  align-items: center;
  min-height: var(--bottom-height);
  padding: 0.75rem max(0.85rem, env(safe-area-inset-right)) calc(0.75rem + env(safe-area-inset-bottom)) max(0.85rem, env(safe-area-inset-left));
  border-top: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.82);
  backdrop-filter: blur(18px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.page-counter {
  min-width: 120px;
  color: var(--muted);
  font-weight: 900;
  text-align: center;
}

.reader-ui-hidden .reader-toolbar,
.reader-ui-hidden .reader-picker-strip,
.reader-ui-hidden .bottom-page-nav {
  opacity: 0;
  pointer-events: none;
}

.reader-ui-hidden .reader-toolbar,
.reader-ui-hidden .reader-picker-strip {
  transform: translateY(-14px);
}

.reader-ui-hidden .bottom-page-nav {
  transform: translateY(14px);
}

.reader-ui-hidden .page-arrow {
  opacity: 0;
  pointer-events: none;
}

.reader-ui-hidden.fit-width .single-page-view {
  padding-top: 0;
  padding-bottom: 0;
}

.reader-ui-hidden .scroll-reader {
  padding-top: 0;
  padding-bottom: 0;
}


.reader-fullscreen .single-page-view,
.reader-fullscreen.reader-ui-hidden .single-page-view,
.reader-ui-hidden .single-page-view {
  padding: 0 !important;
}

.reader-fullscreen .reader-picker-strip,
.reader-fullscreen.reader-ui-hidden .reader-picker-strip,
.reader-fullscreen.reader-ui-hidden .reader-toolbar,
.reader-fullscreen.reader-ui-hidden .bottom-page-nav,
.reader-fullscreen.reader-ui-hidden .page-arrow {
  opacity: 0;
  pointer-events: none;
}

.reader-fullscreen .single-page-view {
  width: 100vw;
  width: 100dvw;
  height: 100vh;
  height: 100dvh;
  background: #000;
}

.reader-fullscreen.fit-width .single-page-view img,
.reader-ui-hidden.fit-width .single-page-view img {
  width: 100vw;
  width: 100dvw;
  max-width: 100vw;
  max-width: 100dvw;
}

.reader-fullscreen.fit-page .single-page-view img {
  width: auto;
  max-width: 100vw;
  max-width: 100dvw;
  max-height: 100vh;
  max-height: 100dvh;
}

.reader-fullscreen .bottom-page-nav,
.reader-fullscreen .reader-toolbar,
.reader-fullscreen .page-arrow {
  background: rgba(2, 6, 23, 0.48);
}

/* Legacy reader classes kept for compatibility with old pages if cached. */
.reader-shell,
.chapter-sidebar,
.reader-stage,
.reader-pages,
.bottom-reader-nav {
  display: none;
}

@media (max-width: 920px) {
  .top-nav {
    display: none;
  }

  .hero,
  .deploy-panel,
  .reader-picker-card,
  .library-tools {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 3rem 0;
  }

  .inline-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .reader-picker-card .button,
  .library-tools .button {
    width: 100%;
  }

  .library-stats {
    text-align: left;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  :root {
    --toolbar-height: 116px;
    --bottom-height: 76px;
  }

  body:not(.reader-body) main {
    width: min(100% - 1rem, 1180px);
  }

  .reader-toolbar {
    align-items: center;
    flex-wrap: wrap;
    gap: 0.55rem;
  }

  .reader-back,
  .reader-actions button {
    min-height: 42px;
    padding: 0.58rem 0.78rem;
    font-size: 0.88rem;
  }

  .reader-title {
    order: 3;
    flex-basis: 100%;
    text-align: left;
  }

  .reader-actions {
    margin-left: auto;
  }

  .reader-page-shell {
    height: 100svh;
  }

  .reader-picker-strip {
    top: calc(var(--toolbar-height) + 0.4rem + env(safe-area-inset-top));
    right: max(0.45rem, env(safe-area-inset-right));
    left: max(0.45rem, env(safe-area-inset-left));
    grid-template-columns: 0.8fr 1fr 0.72fr;
    gap: 0.45rem;
    padding: 0.55rem;
  }

  .reader-picker-strip span {
    font-size: 0.64rem;
    letter-spacing: 0.05em;
  }

  .reader-picker-strip select {
    min-height: 40px;
    padding: 0.5rem 0.42rem;
    border-radius: 11px;
    font-size: 0.82rem;
  }

  .single-reader-stage {
    position: fixed;
    inset: 0;
    padding: 0;
  }

  .page-arrow {
    position: fixed;
    top: 50%;
    width: 42px;
    height: 42px;
    transform: translateY(-50%);
    background: rgba(2, 6, 23, 0.54);
    opacity: 0.9;
  }

  .page-arrow-left {
    left: 0.5rem;
  }

  .page-arrow-right {
    right: 0.5rem;
  }

  .single-page-view {
    height: 100vh;
    height: 100svh;
    height: 100dvh;
    padding: 0;
  }

  .single-page-view img {
    width: 100vw;
    border-radius: 0;
    max-width: 100vw;
    max-height: none;
  }

  .fit-page .single-page-view {
    padding: 0;
  }

  .fit-page .single-page-view img {
    width: auto;
    max-width: 100vw;
    max-height: 100svh;
  }

  .reader-ui-hidden.fit-width .single-page-view {
    padding-top: 0;
    padding-bottom: 0;
  }

  .bottom-page-nav {
    grid-template-columns: 1fr auto 1fr;
    gap: 0.45rem;
  }

  .bottom-page-nav .button {
    min-height: 42px;
    padding: 0.52rem 0.62rem;
    font-size: 0.84rem;
  }

  .page-counter {
    min-width: 78px;
    font-size: 0.78rem;
  }

  .reader-help {
    max-height: 76px;
    overflow: auto;
    font-size: 0.76rem;
  }

  .reader-ui-hidden .reader-help {
    display: none;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 2.55rem;
  }

  .reader-picker-strip {
    grid-template-columns: 1fr 1.1fr;
    max-height: 150px;
    overflow: auto;
  }

  .reader-picker-strip label:last-child {
    grid-column: 1 / -1;
  }

  .chapter-card-link {
    grid-template-columns: 58px 1fr auto;
  }

  .chapter-number {
    min-width: 50px;
    min-height: 50px;
  }
}

#reader-help { display: none !important; }